• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Search results

  1. Farhad221

    A level Biology: Post your doubts here!

    Q13
  2. Farhad221

    A level Biology: Post your doubts here!

    It is B, even i dont know how to get it?
  3. Farhad221

    A level Biology: Post your doubts here!

    THANK YOU
  4. Farhad221

    A level Biology: Post your doubts here!

    Ye Yes the answer is B
  5. Farhad221

    A level Biology: Post your doubts here!

  6. Farhad221

    A level Biology: Post your doubts here!

  7. Farhad221

    A level Biology: Post your doubts here!

  8. Farhad221

    A level Biology: Post your doubts here!

    Sorry i have got no clue either.
  9. Farhad221

    A level Biology: Post your doubts here!

    I cant find anything on CO damaging the endothelium cells however NO do form free radicals that effect the endothelium cells. however i am not completly certain. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2517732/ ANYONE ELSE CAN HELP US ON THIS REGARD PLEASE
  10. Farhad221

    A level Biology: Post your doubts here!

    So here we go CO does not cause the destruction of epithelium cells, and nicotine only causes blood vessels to dialate and increase blood pressure hence we are left with C which i checked in my book and does confirm that it causes platelets to stick together. EDIT: MY bad, blood vessels constrict.
  11. Farhad221

    A level Biology: Post your doubts here!

    Is the answer D
  12. Farhad221

    A level Biology: Post your doubts here!

    Not A as mucus production is inctreased, Ciliated epithelium are destroyed so ciliatry movement is reduced, tobacco smoke does not decrease oxgen transport. so the answer is D
  13. Farhad221

    A level Biology: Post your doubts here!

    The answer is B as 1 only happens at lungs as haem combines with oxygen. 3 also occurs at lungs when H+ ion are dissociated from HHB , which then comibe with HCO3 ions
  14. Farhad221

    A level Biology: Post your doubts here!

    At high light intensities stomata usually clos as too much water is lost. It is not B as the graph shows otherwise and it is not D as it does not explain the sudden change in Transpiratrion rate. Now C it is true that some stomata are always open but again it does not explain the sudden change...
  15. Farhad221

    A level Biology: Post your doubts here!

    I will have to say such great explanation and thank you for it.
  16. Farhad221

    A level Biology: Post your doubts here!

    may June 2014 paper 13 question 1 and 13http://maxpapers.com/syllabus-materials/biology-9700/attachment/9700_s14_qp_13/
  17. Farhad221

    Hey can u check this out https://www.facebook.com/groups/438504976312047/

    Hey can u check this out https://www.facebook.com/groups/438504976312047/
    • Farhad221
    • Profile post comment
  18. Farhad221

    I have posted the links

    I have posted the links
    • Farhad221
    • Profile post comment
  19. Farhad221

    Revision group on Facebook or Viber for Science subjects , economics, Business studies.

    can everyone write the subject they are interested in so i will have a rough guess of how many people will be per subject.
  20. Farhad221

    Sharing my CIE A-level Chemistry notes [AS chapters completed]

    When do you think you will be done?
Top